Fin type heat sink fixing assembly

ABSTRACT

A fin type heat sink includes a heat conducting base, fins, pressing plates and positioning members. The fins are parallely installed with an interval apart from each other on the heat conducting base, and a fixing plate is perpendicularly extended from the bottom of each fin. The fixing plate includes through holes, and the pressing plate is installed corresponding to the fin. Each pressing plate is installed on the fixing plate and has combining holes corresponding to the through holes, and the positioning member is fixed onto the heat conducting base, and the positioning member is passed through the through hole and the combining hole and fixed onto the pressing plate, such that the pressing plate presses the fixing plate flatly onto the heat conducting base. Therefore, heat at the heat conducting base can be conducted to the fins quickly to enhance the thermal conduction effect.

FIELD OF THE INVENTION

The present invention relates to a heat sink device, in particular to a fin type heat sink fixing assembly.

BACKGROUND OF THE INVENTION

With the advancement of science and technology, the computing speed of components installed in electronic products has become increasingly faster, and the heat generated per unit area of the heat has increased dramatically, so that most electronic components come with a heat sink to control the operating temperature and maintain the normal operation of the electronic components.

At present, a general heat sink available in the market includes a plurality of parallel fins manufactured by an aluminum extrusion process or a punch forming method. However, the aluminum extruded fins have limitations on the manufacturing process, and a gap of a specific length is usually formed between adjacent fins, so that fewer fins can be installed on the heat sink with fixed dimensions, and the heat sink cannot have a higher density of fins. On the other hand, the fins formed by the punch forming method can be installed with a high density, and the large heat dissipating area of such fins can be used for improving the heat dissipating efficiency, thus holding a leading position in the market.

In a method of fixing the fins by the punch forming method, grooves are formed on a surface of the heat conducting base and provided for inserting the fins, and both sides of the grooves are punched and deformed to embed the fins into the heat conducting base. However, the punch method often fails to force and combine the fins with the heat conducting base securely, and the fins may be loosened easily. Furthermore, the fins embedded into the grooves only have a partial contact with the heat conducting base and provide a small contact area between the fins and the heat conducting base. As a result, the heat at the heat conducting base cannot be conducted to the fins quickly.

In view of the aforementioned drawbacks of the prior art, the inventor of the present invention based on years of experience in the related industry to conduct extensive researches and experiments, and finally provided a feasible solution and design in accordance with the present invention to overcome the drawbacks of the prior art.

SUMMARY OF THE INVENTION

Therefore, it is a primary objective of the present invention to provide a fin type heat sink fixing assembly capable of conducting the heat from the heat conducting base to the fins quickly to enhance the thermal conduction efficiency.

Another objective of the present invention is to provide a fin type heat sink fixing assembly, wherein the fins are combined closely with the heat conducting base.

To achieve the foregoing objectives, the present invention provides a fin type heat sink fixing assembly, comprising a heat conducting base, a plurality of fins, a plurality of pressing plates and a plurality of positioning members, wherein the fins are parallely installed with an interval apart from each other on the heat conducting base, and each fin includes a fixing plate perpendicularly extended from the bottom of the fin, and the fixing plate includes a plurality of through holes formed thereon, and the pressing plate is installed corresponding to the fins, and each pressing plate is installed on the fixing plate and includes a plurality of combining holes corresponding to the through holes respectively, and the positioning member is fixed onto the heat conducting base, passed through the through hole and the combining hole and secured onto the pressing plate, such that the pressing plate can press the fixing plate and attach the fixing plate flatly onto the heat conducting base.

Compared with the prior art, the present invention includes a plurality of through holes formed on the fixing plate at the bottom of the fins, and the heat conducting base includes a plurality of positioning members corresponding to the plurality of pressing plates of the fins, and then the positioning members are provided for fixing and pressing the pressing plate to press the fixing plate, and the fixing plate is attached flatly on the heat conducting base, so that heat can be conducted between surfaces of the fixing plate and the heat conducting base. Therefore, the heat at the heat conducting base can be conducted to the fins quickly to enhance the heat dissipating efficiency. In addition, the positioning member of the present invention is pressed onto the pressing plate to form a pressing block, such that the fixing plate can be combined with the heat conducting base closely to provide the fin type heat sink with a secured structure and a good heat dissipating efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a fin type heat sink of the present invention;

FIG. 2 is a perspective view of a fin type heat sink of the present invention;

FIG. 3 is a first schematic view of pressing a fin type heat sink of the present invention;

FIG. 4 is a second schematic view of pressing a fin type heat sink of the present invention;

FIG. 5 is a perspective view of a fin type heat sink of the present invention after being pressed;

FIG. 6 is a cross-sectional view of a fin type heat sink of the present invention after being pressed;

FIG. 7 is a side view of one preferred embodiment of a fin type heat sink of the present invention;

FIG. 8 is a side view of another preferred embodiment of an assembled fin type heat sink of the present invention;

FIG. 9 is a schematic view of an assembly as depicted in FIG. 8; and

FIG. 10 is a side view of another preferred embodiment of an assembled fin type heat sink of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The technical characteristics and contents of the present invention will become apparent with the following detailed description and related drawings. The drawings are provided for the purpose of illustrating the present invention only, but not intended for limiting the scope of the invention.

With reference to FIGS. 1 and 2 for an exploded view and a perspective view of a fin type heat sink of the present invention respectively, the fin type heat sink 1 comprises a heat conducting base 10, a plurality of fins 20, a plurality of pressing plates 30, and a plurality of positioning members 40.

The heat conducting base 10 is made of metal with good thermal conductivity, and the fins 20 are parallelly installed with an interval apart from each other on the heat conducting base 10. A fixing plate 21 is perpendicularly extended from the bottom of each fin 20, and the fixing plate 21 has a plurality of through holes 210, and a positioning plate 22 is separately and perpendicularly extended from both sides of the fin 20, and the fixing plate 21 and the positioning plate 22 adjacent to the fins are abutted with each other to define a heat dissipating passage 220.

The pressing plates 30 are corresponsive to the fins 20. In other words, the appearance of the pressing plate 30 matches with the size and shape of the fixing plate 21, so that each pressing plate 30 can be installed onto the fixing plate 21, and a plurality of combining holes 300 respectively corresponding to the through holes 210 are formed. In addition, the positioning members 40 is fixed onto the heat conducting base 10, and each positioning member 40 is passed into the through hole 210 and the combining hole 300.

In this preferred embodiment, the positioning members 40 are protruding pillars, and the positioning members 40 and the heat conducting base 10 are integrally formed, and the protruding pillars respectively corresponding to the through holes 210 are arranged on the heat conducting base 10.

With reference to FIGS. 3 to 6 for two schematic views of pressing a fin type heat sink and a perspective view and a cross-sectional view of the pressed fin type heat sink in accordance with the present invention respectively, the fins 20 and the pressing plate 30 are passed through the positioning members 40 and assembled to the heat conducting base 10. A pressing operation is carried out, and a pressing tool 2 is used for pressing the positioning members 40, such that the positioning members 40 are deformed and positioned onto the pressing plate 30. In this preferred embodiment, the positioning members 40 are pressed to form a pressing block 40′ greater than the diameters of the combining hole 300 and the through hole 210 on the pressing plate 30, and the pressing block 40′ substantially in a flat circular shape is pressed against the pressing plate 30, so that the pressing plate 30 presses against the fixing plate 21 to attach the fixing plate 21 flatly onto the heat conducting base 10.

With reference to FIG. 7 for another preferred embodiment of a fin type heat sink of the present invention, the fin type heat sink 1 a of this preferred embodiment comprises a heat conducting base 10 a, a plurality of fins 20 a, a plurality of pressing plates 30 a installed on the heat conducting base 10 a, and a plurality of positioning members 40 a, wherein each fin 20 a includes a fixing plate 21 a perpendicularly extended from the bottom of the fin 20 a, and each pressing plate 30 a presses against the fixing plate 21 a, and the positioning member 40 a is pressed, deformed, and fixed onto the pressing plate 30 a. The difference of this preferred embodiment and the first preferred embodiment resides on that the positioning members 40 a and the heat conducting base 10 a of this embodiment are installed separately, and the heat conducting base 10 a includes a plurality of slots 100 a for fixing the positioning members 40 a therein respectively.

With reference to FIGS. 8 and 9 for another preferred embodiment of a fin type heat sinks of the present invention, the fin type heat sink 1 b of this preferred embodiment comprises a heat conducting base 10 b, a plurality of fins 20 b, a plurality of pressing plates 30 b installed on the heat conducting base 10 b, and a plurality of positioning members 40 b, wherein each fin 20 b has a fixing plate 21 b extended perpendicularly from the bottom of the fin 20 b, and the fixing plate 21 b includes a plurality of through holes 210 b formed thereon, and the pressing plate 30 b includes a plurality of combining holes 300 b formed thereon.

The difference between this preferred embodiment and the first preferred embodiment resides on that the positioning member 40 b of this embodiment is a bolt, and the heat conducting base 10 b includes a plurality of fixing holes 100 b, and the combining hole 300 b is a screw hole, such that the bolt can be passed from one side of the pressing plate 30 b and sequentially through the fixing hole 100 b and the through hole 210 b, and then secured into the screw hole 300 b and fixed onto the pressing plate 30 b, and the pressing plate 30 b presses against the fixing plate 21 b, such that the fixing plate 21 b is attached flatly onto the heat conducting base 10 b.

With reference to FIG. 10 for another preferred embodiment of a fin type heat sink of the present invention, the fin type heat sink 1 c of this preferred embodiment comprises a heat conducting base 10 c, a plurality of fins 20 c, a plurality of pressing plates 30 c installed on the heat conducting base 10 c, and a plurality of positioning members 40 c, wherein and each fin 20 c includes a fixing plate 21 c perpendicularly extended from the bottom of the fin 20 c, and the fixing plate 21 c includes a plurality of through holes 210 c formed thereon, and the pressing plate 30 c includes a plurality of combining holes 300 c formed thereon, and the positioning member 40 c is a bolt.

The difference between this preferred embodiment and the previous preferred embodiment resides on that the fixing hole 100 b of the heat conducting base 10 c of this embodiment is a screw hole, and the bolt is passed from one side of the heat conducting base 10 c through the combining hole 300 c and the through hole 210 c sequentially and secured into the screw hole, such that the pressing plate 30 c presses against the fixing plate 21 c to attach the fixing plate 21 c flatly onto the heat conducting base 10 c, so as to enhance the thermal conduction efficiency.

While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims. 

1. A fin type heat sink fixing assembly, comprising: a heat conducting base; a plurality of fins, installed in parallel with an interval apart from each other on the heat conducting base, and each fin having a fixing plate perpendicularly extended from the bottom of the fin, and the fixing plate having a plurality of through holes formed thereon; a plurality of pressing plates, installed at position corresponding to the fins, and each pressing plate being installed on the fixing plate, and having a plurality of combining holes corresponding to the through holes respectively; and a plurality of positioning members, fixed onto the heat conducting base, and each positioning member passing through the through hole and the combining hole and being fixed onto the pressing plate, such that the pressing plate presses against the fixing plate to attach the fixing plate flatly onto the heat conducting base.
 2. The fin type heat sink fixing assembly of claim 1, wherein the fin includes a positioning plate separately and perpendicularly extended from both sides of the fin, and the positioning plates adjacent to the fin are abutted with each other.
 3. The fin type heat sink fixing assembly of claim 1, wherein the pressing plate has an appearance corresponding to the size and shape of the fixing plate.
 4. The fin type heat sink fixing assembly of claim 1, wherein the positioning members are protruding pillars disposed at positions corresponding to the through holes respectively to be arranged on the heat conducting base.
 5. The fin type heat sink fixing assembly of claim 4, wherein the positioning members and the heat conducting base are integrally formed.
 6. The fin type heat sink fixing assembly of claim 4, wherein the positioning members and the heat conducting base are installed separately, and the heat conducting base includes a plurality of slots formed thereon and provided for fixing the positioning members respectively.
 7. The fin type heat sink fixing assembly of claim 6, wherein the positioning member is pressed to form a pressing block greater than the diameter of the combining hole on the pressing plate.
 8. The fin type heat sink fixing assembly of claim 7, wherein the pressing block is substantially in a flat circular shape.
 9. The fin type heat sink fixing assembly of claim 1, wherein the positioning member is a bolt, and the combining hole is a corresponding screw hole.
 10. The fin type heat sink fixing assembly of claim 9, wherein the heat conducting base includes a plurality of fixing holes formed thereon, and the bolt is passed through the fixing hole and the through hole and secured into the screw hole.
 11. The fin type heat sink fixing assembly of claim 1, wherein the positioning member is a bolt, and the heat conducting base includes a plurality of fixing holes formed thereon, and each fixing hole is a screw hole, and the bolt is passed through the combining hole and the through hole and secured into the screw hole. 